chore(deps): update dependency @koa/router to v13 (open-telemetry#2384)

Author: renovate-bot

package-lock.json

@@ -45,7 +45,7 @@
     "@opentelemetry/api": "^1.3.0"
   },
   "devDependencies": {
-    "@koa/router": "12.0.1",
+    "@koa/router": "13.1.0",
     "@opentelemetry/api": "^1.3.0",
     "@opentelemetry/context-async-hooks": "^1.8.0",
     "@opentelemetry/contrib-test-utils": "^0.43.0",